Mark Zuckerberg and Priscilla Chan are expecting another baby

Mark Zuckerberg and his wife, Priscilla Chan, are expecting
another baby girl, the Facebook CEO announced
on Thursday.

The baby will be their second child after their 1-year-old
daughter, Max.

"After our difficult experience having Max, we weren't sure what
to expect or whether we'd be able to have another child,"
Zuckerberg wrote in a Facebook post.

"When Priscilla and I first found out she was pregnant again, our
first hope was that the child would be healthy. My next hope was
that it would be a girl. I cannot think of a greater gift than
having a sister and I'm so happy Max and our new child will have
each other."

After
their daughter Max was born in December 2015, Zuckerberg and
Chan announced their philanthropic Chan Zuckerberg Initiative to
give away 99% of their wealth. They've since made investments in
education and committed to spending billions on scientific
research to cure the world's known diseases.